Seeking 500 S&W load data for 350gr Sierra JHPs with H110/W296 powder.

[watermonger]

As title says, I came into a box of these and I am trying to find some load data that uses Hodgdon H110 or Winchester 296 powders, so far the only data I can find is utilizing Accurate and Ramshot powders, of which I have none.

 

[forty_caliber]

This should help get you started. Different bullet, same weight. Adjust OAL to cannelure and use a roll crimp.

Pulled from LoadData.com:
Warning! Notes: rifle: S&W Model 500; barrel length: 8 3/8"; case: Hornady; use maximum loads with extreme caution
Be Alert: Publisher cannot be responsible for errors in published load data.

Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)

350 Hornady XTP-MAG Winchester W-296 34.9 1,400
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"
350 Hornady XTP-MAG Winchester W-296 37.4 1,500
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"

350 Hornady XTP-MAG Winchester W-296 39.9 1,600
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"
350 Hornady XTP-MAG Winchester W-296 41.2 1,650
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"

.40

 

[watermonger]

This should help get you started. Different bullet, same weight. Adjust OAL to cannelure and use a roll crimp.

Pulled from LoadData.com:
Warning! Notes: rifle: S&W Model 500; barrel length: 8 3/8"; case: Hornady; use maximum loads with extreme caution
Be Alert: Publisher cannot be responsible for errors in published load data.

Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)

350 Hornady XTP-MAG Winchester W-296 34.9 1,400
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"
350 Hornady XTP-MAG Winchester W-296 37.4 1,500
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"

350 Hornady XTP-MAG Winchester W-296 39.9 1,600
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"
350 Hornady XTP-MAG Winchester W-296 41.2 1,650
Remarks: primer: WLPM or WLR; C.O.L.: 2.000"

.40

Is it safe to use different load data like that? the XTP sits slightly deeper than the Sierra JHP does, I suppose that would mean less pressure for the same charge weight?

 

[forty_caliber]

I don't think it will make a noticeable difference. As always start low and work up.

.40

 

[LiveLife]

500 S&W load data for 350gr Sierra JHPs with H110/W296

FYI, from Hodgdon - http://www.hodgdonreloading.com/data/pistol

Case: Starline
Twist: 1:18"
Primer: Winchester Large Rifle Magnum
Barrel Length: 10"
Trim Length: 1.615"

• 500 S&W Magnum 350 gr XTP W296/H110 COL 1.985" Start 39.0 gr (1,712 fps) - Max 43.0 gr (1,877 fps)

 

[ballman6711]

This is Sierra's 6th edition.



Interestingly the Sierra app shows a start charge of 43.0gr using H-110 and a start charge of 42.7gr using W-296. The app also shows 47.9gr as a max charge for both powders.

chris

 

[Cheesemaker]

Here is the Sierra 5th edition. Big difference for the H110 #s between the 6th and 5th. I have no clue why.

I bought the 5th edition several years ago. It did not have data for 460S&W and 500S&W. I emailed Sierra and they sent me a PDF for the 500 part of which I am attaching. They did not have 460 data.

From the PDF:
Firearm Used: Smith & Wesson M500
Barrel Length: 8 3/8"
Twist: 1 x 18"
Case: Starline
Trim-to Length: 1.615"
Primer: WLR

 

[ballman6711]

I see that the coal from your 5th is 2.050" vs 2.060" for my 6th. I also see that your book limits speeds to 1650 fps vs 2000 fps for my book.

I can't imagine that the 0.010" in length would allow that much more powder. Instead I would think they changed the bullet. Maybe less bearing surface reducing pressure, or maybe a better/thicker jacket allowing the higher speed without shedding.

The OP may want to call or email Sierra for the answer.

chris

 

[Cheesemaker]

I agree. The OP may want to call Sierra.
If you go with the 6th edition - 350gr @ 2000fps = 3,109 ft/lbs . That seems way high to me.

Looking back thru my reloading & chrono notes I chrono'd 350gr Sierra with 39.0gr H110 @ 1500fps = 1,749 ft/lbs. Not a hot 500 load by any stretch.

I don't usually use H110 in the 500 (I tend to use it in the 460 and 454) - I prefer AA#9 in the 500

 

[watermonger]

This is Sierra's 6th edition.

View attachment 944915

Interestingly the Sierra app shows a start charge of 43.0gr using H-110 and a start charge of 42.7gr using W-296. The app also shows 47.9gr as a max charge for both powders.

chris

What is the trim length on the brass for that load, 1.615?

 

[ballman6711]

What is the trim length on the brass for that load, 1.615?

Yes it is 1.615".



chris

 

[watermonger]

Yeah a .01" increase in COAL only increases the usable case capacity from 45.866 grains to 46.355 grains, so unless they were running really low pressures in the 5th edition I don't see how they were able to safely increase the charge weight so drastically.